KT-36860 Collect extensions from object on first completion

- This should not affect the performance of the completion, since all
object extensions are collected on the last step, when all main variants
are already collected
- Add more tests
- Also, disable completion of extensions from objects as callable
references (^KT-37395 Fixed)
- ^KT-36860 Fixed

idea/idea-completion/testData/basic/common/extensionMethodInObject/CompanionObjectExplicitReceiver.kt

@@ -11,6 +11,5 @@ fun usage(t: T) {
     t.foo<caret>
 }
 
-// INVOCATION_COUNT: 2
 // EXIST: { lookupString: "fooExtension", itemText: "fooExtension" }
 // EXIST: { lookupString: "fooProperty", itemText: "fooProperty" }

idea/idea-completion/testData/basic/common/extensionMethodInObject/CompanionObjectExplicitReceiverInfixExtension.kt

@@ -0,0 +1,13 @@
+class T
+
+class A {
+    companion object {
+        infix fun T.fooExtension(i: Int) {}
+    }
+}
+
+fun usage(t: T) {
+    t foo<caret>
+}
+
+// EXIST: { lookupString: "fooExtension", itemText: "fooExtension" }

idea/idea-completion/testData/basic/common/extensionMethodInObject/CompanionObjectExplicitReceiverNoPrefix.kt

@@ -0,0 +1,15 @@
+class T
+
+class A {
+    companion object {
+        fun T.fooExtension() {}
+        val T.fooProperty get() = 10
+    }
+}
+
+fun usage(t: T) {
+    t.<caret>
+}
+
+// EXIST: { lookupString: "fooExtension", itemText: "fooExtension" }
+// EXIST: { lookupString: "fooProperty", itemText: "fooProperty" }

idea/idea-completion/testData/basic/common/extensionMethodInObject/CompanionObjectExplicitReceiverSafeAccess.kt

@@ -0,0 +1,15 @@
+class T
+
+class A {
+    companion object {
+        fun T.fooExtension() {}
+        val T.fooProperty get() = 10
+    }
+}
+
+fun usage(t: T) {
+    t?.foo<caret>
+}
+
+// EXIST: { lookupString: "fooExtension", itemText: "fooExtension" }
+// EXIST: { lookupString: "fooProperty", itemText: "fooProperty" }

idea/idea-completion/testData/basic/common/extensionMethodInObject/CompanionObjectImplicitReceiver.kt

@@ -11,6 +11,5 @@ fun T.usage() {
     foo<caret>
 }
 
-// INVOCATION_COUNT: 2
 // EXIST: { lookupString: "fooExtension", itemText: "fooExtension" }
 // EXIST: { lookupString: "fooProperty", itemText: "fooProperty" }

idea/idea-completion/testData/basic/common/extensionMethodInObject/CorrectTypeExplicitReceiver.kt

@@ -21,7 +21,6 @@ fun usage(b: B) {
     b.foo<caret>
 }
 
-// INVOCATION_COUNT: 2
 // EXIST: { lookupString: "fooForAny", itemText: "fooForAny" }
 
 // EXIST: { lookupString: "fooForT", itemText: "fooForT" }

idea/idea-completion/testData/basic/common/extensionMethodInObject/CorrectTypeImplicitReceiver.kt

@@ -21,7 +21,6 @@ fun B.usage() {
     foo<caret>
 }
 
-// INVOCATION_COUNT: 2
 // EXIST: { lookupString: "fooForAny", itemText: "fooForAny" }
 
 // EXIST: { lookupString: "fooForT", itemText: "fooForT" }
@@ -30,7 +29,7 @@ fun B.usage() {
 // EXIST: { lookupString: "fooForTGeneric", itemText: "fooForTGeneric" }
 // EXIST: { lookupString: "fooForBGeneric", itemText: "fooForBGeneric" }
 
-// EXIST: fooNoReceiver
+// ABSENT: fooNoReceiver
 
 // ABSENT: fooForC
 // ABSENT: fooForCGeneric

idea/idea-completion/testData/basic/common/extensionMethodInObject/MultipleImplicitReceivers.kt

@@ -17,7 +17,6 @@ class A {
     }
 }
 
-// INVOCATION_COUNT: 2
 // EXIST: { lookupString: "fooForA", itemText: "fooForA" }
 // EXIST: { lookupString: "fooForB", itemText: "fooForB" }
 // EXIST: { lookupString: "fooForT", itemText: "fooForT" }

idea/idea-completion/testData/basic/common/extensionMethodInObject/ObjectExplicitReceiver.kt

@@ -9,6 +9,5 @@ fun usage(t: T) {
     t.foo<caret>
 }
 
-// INVOCATION_COUNT: 2
 // EXIST: { lookupString: "fooExtension", itemText: "fooExtension" }
 // EXIST: { lookupString: "fooProperty", itemText: "fooProperty" }

idea/idea-completion/testData/basic/common/extensionMethodInObject/ObjectImplicitReceiver.kt

@@ -9,6 +9,5 @@ fun T.usage() {
     foo<caret>
 }
 
-// INVOCATION_COUNT: 2
 // EXIST: { lookupString: "fooExtension", itemText: "fooExtension" }
 // EXIST: { lookupString: "fooProperty", itemText: "fooProperty" }

idea/idea-completion/testData/basic/common/extensionMethodInObject/OverridenExtensionsInObject.kt

@@ -14,6 +14,5 @@ fun T.usage() {
     foo<caret>
 }
 
-// INVOCATION_COUNT: 2
 // EXIST: { lookupString: "fooExtension", itemText: "fooExtension" }
 // EXIST: { lookupString: "fooProperty", itemText: "fooProperty" }